I was throwing out old 2005-2009 multisession discs, and found this nifty idea for reuse
Ping-Pong CD Solar Concentrator
Wonder how many I need to cook a pizza?
cooking pizza with puppylinux CDs
http://www.greeniacs.com/GreeniacsGuide ... wered.html
Silver compact discs should be ok for that.
Silver compact discs should be ok for that.
If you want to try the CD-method, it is best to collect as many compact disks as humanly possible. Given their empty center, they need to be heavily overlapped in a fish-scale design to assure maximum reflectivity.